Shimano XTR M980 Rear Derailleur

It doesn't matter how your derailleur does what it does, as long as it keeps doing it when the trail conditions get nasty. For 2011, Shimano has designed a rear derailleur to do exactly that -- no sick days, weather delays, "wardrobe malfunctions" or hiccups -- it does what it does, period. The reengineered architecture on this Shimano rear derailleur gives you a smooth, linear feel at the shifter, and remains stable in the midst of suspension movement, trail chatter or the ever-presen...